Earth Resistance Test By Loop Method - Fluke 1662 User Manual

1662/1663/1664 FC
Users Manual

Earth Resistance Test by Loop Method

You can also use the Tester to measure the earth resistance component of the
total loop resistance. Check your local regulations to determine if this method is
acceptable in your area. You can use three leads or the mains test cord to do
this test. Use the connection shown in Figure 13 when you make a 3-wire
connection for earth resistance loop test. Zero the test leads before the test
(see page 22).
L
N
N (Blue)
PE
PE (Green)
B
G
R
L (Red)
hwl024.eps
Figure 13. 3-Wire Connection for Earth Resistance Loop Test (No Trip
Mode)
If necessary to meet local regulations, you can measure the earth resistance
with the high-current trip mode. To measure loop impedance with the high-
current trip mode, see page 37. Any RCD will trip during this test. The test
result will include the resistance of the phase wire and this might be neglected
for higher RE resistances. Use the connection shown in Figure 14 when you
make a 2-wire connection for earth resistance loop test.
58